证明：等腰三角形底边中点到两腰距离相等．（请画出图形并写出已知.求证及证明过程）

【写法借鉴】文章前半部分写托尔斯泰平庸粗陋的一面，外貌平庸甚至丑陋，与普通人毫无二致。这样的描写非但没有损害托尔斯泰在读者心目中的形象，反而收到相反相成的艺术效果，反衬出他灵魂的高贵，眼睛的精美绝伦。欲扬先抑的手法，使托尔斯泰的眼睛给人留下强烈深刻的印象。

【片段仿写】请你也用欲扬先抑的手法描写一个人物。(150字左右)

补全对话, 其中有两个多余选项。

(D=Darren, C=Carol)

D: Hi. Carol! ____

C: Oh, hi, Darren. I’m just getting ready for the Red Nose Day concert tomorrow.

D: Oh, really? Well, I’m free this afternoon. ____

C: Actually, I’ve nearly finished. Jim and I are going to put up some ads later, though. Could you please help us with that?

D: ____

C: That’s wonderful! Oh, there’s one more thing. Would you mind coming early tomorrow to help sell tickets at the door?

D: Not at all. ____

C: Around six would be great.

D: OK. ____

C: Great.